diff --git a/requirements.txt b/requirements.txt
index 67b0012..317537e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ requests==2.23.0
 Rx==1.6.1
 six==1.14.0
 starlette==0.13.2
-ujson==2.0.3
+ujson==5.2.0
 urllib3==1.25.8
 uvicorn==0.11.3
 websockets==8.1